Water-tube boiler.



Patented lune I8, I90l.

c. P. ALTMANN. WATER TUBE BUILER.

(Application tiled Aug. 21, 1900.)

(No Model.)

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UNITED STATES ATENT unici-3,

CHARLES PHILIPPE ALTMANN, OE LYON VAISE, FRANCE.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent N o. 676,485, dated J' une 18, 1901.

Application filed August 21, 1900. Serial No. 27,601. (No model.)

To lf/ZZ whom, it' may concern.

Be it known that I, `CHARLES PHILIPPE ALT- MANN, engineer, a citizen of France,'residing at 10 Rue des Tuileries, Lyon Vaise, France, have invented certain new and useful Improvements in Vsater-Tube Boilers, of which the following is a specification.

The present invention relates to steam-generators with water-tubes for producing rapid vaporization characterized by a large heatingsurface but of moderate size and by a special manner of arranging the principal parts which considerably facilitates the dismounting of the boiler and the cleaning of all the elements wit-hout employing for this purpose special labor or instruments.

In the annexed drawings, Figure l is a sectional elevaton of the generator, and Fig. 2 a horizontal section of Fig. l on the line 2 2.

The generator comprises two cylindrical concentric jackets ct b, inserted one Within the other in such a manner as to leave between them to almost the total extent of their height a certain amount of space and joined one to the other at their ends. A special kind of joint, to which the uid under pressure (water or steam) has little or no access, insures tightness at each end. For this purpose the lower end of the jacket a is provided with a circular rim entering into a corresponding recess in the jacket b. Between the fiat surfaces of the said two parts a ring c of suitable material is placed. At convenient distances from each other screws CZ are placed, which engage screw-nuts e, partially lodged in recesses in the jacket b. The ends of the said screws CZ bear against the lower edge of the jacket d, so that the tightening of the said screws effects that of the joint c, and consequently insures the tightness of the jackets d and b at the lower ends.

At the upper part the jacket Z) is provided with a circular recess, in the bottom of which a ring, consisting of suitable material and encircling the jacket d, is placed and is compressed by a ring g, similar to those used in the packing of cylinders and the like. This ring is held by blind screw-nuts h, the bolts ot' which have T-shaped heads lodged in a groove in the jacket These screw-nuts h are provided with a hole which allows of them being easily tightened by means of a pin or The interior jacket a serves as a cylindrical tube-plate to several concentric series of tubes ij Za, bent in U shape, making communication between the lower and upper parts of the annular space between the jackets tt and Z). Each of these tubes, the number of which can vary according to the dimensions of the apparatus, has its points of junction Vith the mantle a on the same generating-lineof the latter. A collector Z, placed in the center of the upper part of the generator, is connected with the annular space between the jackets d and b by a series of horizontal or slightlyinclined radiating tubes m and is also connected with the lower part of the said annular space by a series of rectangularly-bent tubes n, as shown in Fig. l. From the bottom of the collector Z a tube o, closed at its lower end, descends toward the bottom of the generator. The steam-pipe p starts from the bottom of the said pipe o and ends at the upper part of the collector Z, which communicates with the motor by means of a suitably-arranged pipe q. The entire outer surface of the inner jacket a is provided with deep grooves and its inner surface with rectilineal grooves corresponding to the generating-lines. The raised parts left between the said grooves considerably increase the contact-surface between the heated metal and the water or steam and between the metal and the heated gases, and consequently increases the capacity of the generator.

The action of the generator is as follows: By means of a pump or any other device the water-level is kept constantly at a certain height t t, which. can be regulated by a suitable iioat. -The said level can, however, be regula-ted at will for the purpose of proportioning the degree of superheating of the steam to the output of the generator, the level rising when the output is feeble and sinking when the output increases. The different levels can be obtained automatically or by hand. Theheatfrom thefurnaceinthelower part of the generator underneath the group of IOO tubes evaporizes the water contained in the tubes and in the annular space between the jackets ot and b and also heats the tube o, the useful surface area of which can with advantage be increased by means of ribs, as shown in the drawings. At rst the steam rapidly absorbs in rising the heat necessary to superheat it'. The superheating can be suitably regulated by varying the water-level in the generator, as above mentioned. The super- .heating is rendered complete by the passage scribed.

I declare that what I claim'isl. A steam-boiler comprising wallshaving longitudinal ribs upon the surfaces which are r in contact with the flames of the furnace, and

having transverse ribs upon the surfaces which are in contact with the water or the steam, substantially as described above.

2. A steam-boiler comprising a cylindrical jacket a, provided on its surface where it comes in contact with the flames of the furnace with longitudinal ribs, and being provided with circular ribs where its surface comes in contact with the water or steam, and a smooth jacket h of a greater diameter and surrounding aforesaid jacket OZ, whereby an annular space is produced between said jackets, substantially as described above.

3. A steam-boiler comprising two jackets a and b of different diameters,of which one surrounds the other whereby an annular space is produced between the same, the inner jacket ct being provided on the portions of its surface which are in contact with the fiames of the furnace with longitudinal ribs and on the portions of its surface which are in contact with the water and the steam with circular ribs and having upon its lower portion a circular projection in the form of a fiange forced against an interior cheek of the exterior jacket through the intel-position of a joint c by means of screws CZ operating in pieces c flxedly secured to the lower extremity of the exterior jacket ZJ, while the upper portion of the inner jacket CL is smooth and joined to the exterior jacket Z9 by means of the stufting-box gland g and f, substantially as described above.

Il. A steam-boiler comprising an exterior smooth jacket b, an interior jacket d having very thin walls provided on its surface where it is in contact with the iiames of the furnace with longitudinal ribs and on the portions of its surface which are in contact with the water or steam with circular ribs, U-shaped tubes t' inserted in the interior jacket d and communicating with the annular space between said jacket a and the exterior jacket Z), a steam-collector Z connected with the upper portion of said annular space by means of radial tubes m, a tube o provided exteriorly with longitudinal ribs closed at its lower end and communicating with said collector Z, a tube p extending to the bottom of said ribbed tube 0, passing through said collector Z and-communicating directly with the pipe q into which the steam passes, substantially as set forth above.

In witness whereof I have signed this specifica-tion in the presence of two witnesses.

CHARLES PHILIPPE ALIMANN.

Witnesses:

Trios. N. BRowNE, JEAN S. COUPRIE. 

